公开(公告)号：EP1642427A1

公开(公告)日：2006-04-05

申请号：EP04743079.8

申请日：2004-06-25

申请人： IPWireless, Inc.

发明人： SPEIGHT, Timothy ,  JELBERT, Nicholas

IPC分类号： H04L12/56

CPC分类号： H04L47/193 ,  H04L47/10 ,  H04L47/14 ,  H04L47/26 ,  H04L47/283 ,  H04L69/163 ,  H04W80/06

摘要： An arrangement (124) and method (310-360) for Transmission Control Protocol (TCP) flow control in a communication system, by: determining delay in a transmit buffer of the system; and modifying TCP window size dependent on the determined delay. An indication of modified TCP window size is preferably sent to a TCP server (140) of the system in an acknowledge packet (310). The invention is particularly suitable for TCP flow control in wireless communication systems (e.g., UTRA) systems, and has the advantage that RTT (i.e., the latency of the system) can be substantially guaranteed, irrespective of the throughput that a user is allocated.

公开(公告)号：EP1597842A1

公开(公告)日：2005-11-23

申请号：EP04710079.7

申请日：2004-02-11

申请人： IPWireless, Inc.

发明人： JONES, William, John ,  CHEUNG, Joseph, Chung, Shing ,  JONES, Alan, Edward

IPC分类号： H04B7/26

CPC分类号： H04L5/1438 ,  H04B7/2643 ,  H04J4/00 ,  H04W16/04 ,  H04W16/06

摘要： A method, NodeB (320) and User Equipment (330) for TDD operation in a communication system operating in TDD mode in a frequency band allocated for FDD operation. Preferably, operation is in TDD uplink and downlink mode in a first frequency band designated or normally used for FDD uplink communication, and in TDD downlink-only mode in a second frequency band designated or normally used for FDD downlink communication. The invention provides the following advantages: Provides a flexible method to deploy a time division duplex architecture in frequency division duplex spectrum. Allows flexible use of system capacity by adjusting the uplink and downlink capacity split. Removes previous FDD duplex restrictions.

公开(公告)号：EP1561295A1

公开(公告)日：2005-08-10

申请号：EP03769702.6

申请日：2003-11-03

申请人： IPWireless, Inc.

发明人： DARWOOD, Peter Bruce ,  JONES, Alan Edward

IPC分类号： H04J13/04

CPC分类号： H04J13/107 ,  H04B2201/70701

摘要： An efficient scheme for CDMA coding constructs codes by generating longer code sequences (430) via concatenation, from an existing set of short sequences (410, 420). The sequences may be spreading, scrambling and or training or channel estimation (such as midamble) sequences. The invention allows extension of sequences without performing an exhaustive search for sequences with optimal desired properties, as well as extension of the sequence duration to improve the detection of wanted signals via the use of a conventional matched filter, a multi-user detector or an adaptive filter/equaliser.

摘要翻译： 用于CDMA编码的有效方案通过从现有的一组短序列（410,420）通过级联产生更长的码序列（430）构成码。 序列可以是扩展，加扰和/或训练或信道估计（例如中间码）序列。 本发明允许扩展序列而不执行穷尽搜索具有最佳期望属性的序列，以及延长序列持续时间以通过使用常规匹配滤波器，多用户检测器或自适应滤波器来改善所需信号的检测 过滤器/均衡器。

公开(公告)号：EP1557018A1

公开(公告)日：2005-07-27

申请号：EP03753813.9

申请日：2003-10-20

申请人： IPWireless, Inc.

发明人： HOWARD, Paul

IPC分类号： H04L25/03

CPC分类号： H04L25/03343 ,  H04L2025/03401

摘要： An arrangement (100) and method for RF filtering in a Node B of a UMTS TDD system by providing: a DAC converter (130) converting digital signals to analog signals; providing a narrow band analogue channel filter (150) filtering the analog signals; and providing a digital pre-equaliser FIR filter (120) coupled before the DAC (120) to filter the digital signals, the digital pre­equaliser filter means substantially correcting for non linear phase response (122) non-ideality and amplitude response non-ideality (124) in the analogue channel filter (150). This provides the following advantage(s): it enables 3GPP Node B co-location specifications to be met while providing both good transmit accuracy and acceptable ISI performance; and it allows filter centre frequency to be field tuned in software, permitting a basic RF single-channel filter to used with its centre frequency being field adjustable to a desired value centred on a UMTS channel.

公开(公告)号：EP1466454A1

公开(公告)日：2004-10-13

申请号：EP02755370.0

申请日：2002-09-13

申请人： IPWireless, Inc.

发明人： JONES, Alan Edward ,  HOWARD, Paul ,  ARMSTRONG, Robert

IPC分类号： H04L27/00

CPC分类号： H04L27/0014 ,  H04L2027/0028 ,  H04L2027/0065

摘要： A method and arrangement for automatic frequency correction in UTRA TDD mode, having a first stage (500) for frequency lock in idle mode, and a second stage (600) for receiving a channel estimate from beacon function (mx1), receiving a channel estimate from at least one other physical channel (mx2), and receiving output from a primary synchronisation code correlator (mx0,pc1,pc2), and for producing therefrom signals (X,Y,N) for use in frequency correction. By utilising first and second partial correlation values (pc1,pc2) which are balanced, DC offset effects may be substantially removed. This provides the following advantage of significantly improving performance at low levels of SNR, and removal of DC offset effects provides immunity to DC offsets arising from imperfections in hardware.

公开(公告)号：EP1440521A1

公开(公告)日：2004-07-28

申请号：EP02745563.3

申请日：2002-07-02

申请人： IPWireless, Inc.

发明人： JONES, Alan, Edward ,  GEERS, Steven

IPC分类号： H04B1/707 ,  H03H17/02

CPC分类号： H04B1/7093 ,  H04B2201/70703

摘要： A chip rate invariant detector is used in a wireless spread spectrum high capacity communications system which can accommodate two or more different chip rates. At a higher chip rate the data blocks are segmented into uniform suitable sizes for the detector which has an encreased data block length to prevent loss of information to smearing due to effective overlap of segmenteddata blocks. The resultant data blocks are cut down to standard size by discarding samples (21) and applies to a matched filter (23) for further standard information processing.

公开(公告)号：EP1098539A2

公开(公告)日：2001-05-09

申请号：EP00309640.1

申请日：2000-11-01

申请人： IPWireless, Inc.

发明人： Quayle, Roger Phillip ,  Jones, William John ,  Jones, Alan Edward

IPC分类号： H04Q7/22

CPC分类号： H04L63/083 ,  H04L63/0853 ,  H04L67/14 ,  H04L69/329 ,  H04W8/265 ,  H04W12/06 ,  H04W84/042 ,  Y10S370/908 ,  Y10S370/913

摘要： A cellular wireless internet access system which operates in the 2.5 to 2.68 GHz band and which must comply with complex government regulations on power levels, subscriber equipment and interference levels yet which provides high data rates to users and cell sizes of 1 ½ miles radius or more from base stations with subscriber equipment and antennas mounted indoors. Such base stations are mounted low and use spread-spectrum transmission to comply with interference rules with respect to adjacent license areas. An unidirectional tear-drop coverage pattern is used at multiple cells to further reduce interference when required. Time division duplex is used to allow the system to operate on any single channel of varying bandwidth within the 2.5 to 2.68 GHz band. Backhaul transmission from base stations to the Internet is provided using base station radio equipment, operating either on a different frequency in the band or on the same frequency using a time-division peer-to-peer technique. Different effective data rates are provided by a prioritization tiering technique.

摘要翻译： 一种运行在2.5至2.68 GHz频段的蜂窝无线互联网接入系统，必须符合复杂的政府法规，对功率级别，用户设备和干扰级别，为用户提供高数据速率和1 1/2英里半径的小区大小 或更多来自具有安装在室内的用户设备和天线的基站。 这样的基站被安装得很低，并且使用扩频传输来遵守相邻许可区域的干扰规则。 在多个单元处使用单向撕裂覆盖图案以在需要时进一步减少干扰。 时分双工用于允许系统在2.5至2.68 GHz频带内的变化带宽的任何单个信道上工作。 使用基站无线电设备提供从基站到因特网的回程传输，其使用时分对等技术在频带中或在相同频率上以不同的频率进行操作。 通过优先级分层技术提供不同的有效数据速率。